CN103951044B - A kind of non-sintered rapid biofilm biologic packing material and preparation method thereof - Google Patents
A kind of non-sintered rapid biofilm biologic packing material and preparation method thereof Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A kind of Novel free sintering rapid biofilm biologic packing material and preparation method thereof, relates to a kind of biologic packing material and preparation method thereof.The present invention is that will to solve existing biologic packing material biofilm time in water treatment procedure long, and effluent quality is poor, and preparation technology consumes energy greatly, the technical problem of contaminate environment.Biologic packing material of the present invention is by sepiolite, and medical stone, cement, polyvinyl alcohol, sodium alginate, hydrogen peroxide, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are made.Method is: one, by polyvinyl alcohol and sodium alginate heating for dissolving, adds hydrogen peroxide mixing, obtain liquid mixture after cooling; Two, by liquid mixture and other solids component mixing granulation, normal temperature is placed, and dry screening, through high pressure low temperature maintenance, constant temperature is steam-cured, and normal temperature cools, and to obtain final product.Biologic packing material of the present invention is compared with ordinary ceramsite, and the biofilm time is short, and effluent quality is good, and surface irregularity is conducive to microorganism growth.The present invention is applied to environmental applications material and sewage treatment area.
Description
Technical field
The present invention relates to a kind of biologic packing material and preparation method thereof.
Background technology
BAF belongs to the one in biomembrance process treatment process, and principle of work mainly loads the less particulate filler of certain particle diameter in filter tank, and with this particulate filler for carrier, highly active microbial film in surface growth, the inner aeration in filter tank.Effluent stream through time, the microbial film of filling surface attachment, gives full play to the metabolism of microorganism, and the absorption of granulated filler and crown_interception, processes sewage.Come off when the microbial film of filling surface thickens, carry out back flushing when effluent quality is deteriorated, head loss increases, rinse out and retain dirt and aging microbial film, after biofilm again, recover purifying water effect.And the selection of biologic packing material decides operation and the water treatment efficiency of BAF.Think that specific surface area is large at present, surface irregularity, is beneficial to microorganism growth; Lighter weight, density is less, and the filler of stable chemical nature is required in practical application.
Filler is that microorganism growth provides attachment place, retains pollutent, so the characterization of adsorption on its biocompatibility and surface has very important impact for water treatment efficiency.One of research direction of current biologic packing material is mainly by carrying out surface modification to mineral filler thus improving BAF carrier surface forming biofilm property.University Of Nanchang Li Feng qins etc. adopt flyash to combine with haydite and made a kind of new packing, and result of study shows this filler relative to ordinary ceramsite specific surface area to be increased to some extent, but there is the phenomenons such as filler Middle nutrition scarcity.The neat soldier of Tsing-Hua University waits by force and screens the inorganic filtrate of difference, and compare in BAF purifying domestic sewage with biological activated carbon, result shows that haydite, sand, Datong District's zeolite and medical stone are better than other several filtrates in bio-film colonization.But the above biologic packing material studied, exists preparation technology's contaminate environment and cost is higher, biofilm speed is comparatively slow, and back flushing artifact film is long for time of recovery, the problems such as absorption property is poor, and effluent quality is undesirable.
Find that sepiolite and medical stone can as the main ingredients of biologic packing material by research.Wherein sepiolite is a kind of clay mineral of fibre layered moisture magnesosilicate, has many tubulose penetrating vias consistent with fiber elongation direction in the fibrous crystalline structure of sepiolite.This special structure makes sepiolite specific surface area large, and porosity is high, has good adsorptivity, and sepiolite itself is nontoxic, does not affect microorganism growth.Medical stone is a kind of natural mineral matter, the poroid structures shape of the honeycomb had its there is good absorption property.Medical stone contains the trace element required for microorganism growth, is conducive to the biofilm that microorganism shows at filler, thus plays good treatment effect to water pollutant.
The preparation of current biologic packing material generally adopts the technique of high-temperature calcination, and the power consumption of this technique is high, contaminate environment, is the technical barrier that aspect needs solution prepared by filler.Domestic in the research of biologic packing material at present, the preparation technology adopted and the main composition selection of biologic packing material are had nothing in common with each other, but for sepiolite and medical stone for main raw material adds nutritive element, and prepare new packing aspect in conjunction with non-sintered mode and but rarely have report.
Summary of the invention
The present invention is that will to solve existing biologic packing material biofilm time in water treatment procedure long, and effluent quality is poor, and preparation technology consumes energy greatly, the technical problem of contaminate environment, thus provides a kind of Novel free sintering rapid biofilm biologic packing material and preparation method thereof.
A kind of Novel free sintering rapid biofilm biologic packing material of the present invention press mass percentage by 18% ~ 37% sepiolite, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7% are made.
The preparation method of above-mentioned a kind of Novel free sintering rapid biofilm biologic packing material carries out according to the following steps:
One, the sepiolite of 18% ~ 37% is taken by mass percentage, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7%;
Two, polyvinyl alcohol step one taken and sodium alginate heating for dissolving, in water, add the hydrogen peroxide mixing that step one takes, obtain liquid mixture after cooling;
Three, sepiolite step one taken, medical stone, cement, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are pulverized last mixing, and obtain solid mixture;
Four, after the solid mixture mixing that liquid mixture step 2 obtained and step 3 obtain; the spherical particle of surface moisture is made with tablets press; after normal temperature places 1 ~ 2h; move on in baking oven and dry 1 ~ 2h at temperature is 80 ~ 90 DEG C; then the filler of 4 ~ 8mm is sieved out; it is 80 ~ 90 DEG C in temperature; pressure be under 0.1 ~ 0.15MPa after high pressure low temperature maintenance 10 ~ 12h; to be placed on water-bath at 60 ~ 80 DEG C constant temperature steam-cured 8 ~ 10 days; normal temperature cooling again, obtains Novel free sintering rapid biofilm biologic packing material.
The present invention includes following beneficial effect:
1, adopt sepiolite and medical stone to be filler main ingredient in the present invention, sepiolite is a kind of clay mineral of fibre layered moisture magnesosilicate, has many tubulose penetrating vias consistent with fiber elongation direction in the fibrous crystalline structure of sepiolite.This special structure makes sepiolite specific surface area large, and porosity is high, has good adsorptivity, and sepiolite itself is nontoxic, does not affect microorganism growth.Medical stone is a kind of natural mineral matter, the poroid structures shape of the honeycomb had its there is good absorption property.Medical stone contains the trace element required for microorganism growth, is conducive to the biofilm of microorganism at filling surface, thus plays good treatment effect to water pollutant.
2, agar itself is as the main component in biological medium, microbial growth can be promoted, and join in Novel biofilm carrier as Biostimulation agent, will microorganism be conducive in the attachment of filling surface and growth, thus be conducive to the biofilm of microorganism at filling surface.
3, adopt cement as one of binding agent in the present invention, wherein cement has the hydraulicity, by the steam-cured hardness that can increase filler of constant temperature.Extend filler work-ing life, ensure that filler makes it from wearing and tearing carrying out bearing water impact in purification of water quality process.
4, the polyvinyl alcohol used has cementing property, is good binding agent.Sodium alginate has gelification, the interpolation of polyvinyl alcohol and sodium alginate can form macromolecule hydrogel, slowly degrade under the effect of microorganism, trace element controllably needed for releasing microbe growth and nutritive substance, when nutritional condition instability, maintain microbial growth, make microorganism can not because nutrition is too high raised growth, also can not be dead gradually because nutrition is too low, such nutrition that provides is conducive to biomembranous formation.Polyvinyl alcohol and sodium alginate all can not to the toxic effects of microorganism in addition, and especially sodium alginate has good biocompatibility, are a kind of " environmentally friendly " materials.
5, the present invention adopts hydrogen peroxide to be whipping agent, under the effect of high pressure steam, peroxide decomposition produces bubble, thus makes the filler made have vesicular structure, increases specific surface area, large specific surface area and vesicular structure can be conducive to the attachment of microorganism, are beneficial to the biofilm of microorganism.
6, the present invention with the addition of iron(ic) chloride, cobalt chloride, manganous sulfate in prepared filler.Ferro element, cobalt element, manganese element is the trace element needed for microorganism growth, these elements are added in filler, microorganism can be made under poor nutrient environment to maintain growth, accelerate biomembranous formation, reduce biofilm time and back flushing artifact film time of recovery of filler.
7, the present invention have employed non-sintered technique in preparation technology, not only prevents sepiolite and medical stone crystalline structure from high temperature changing, also avoid agar sex change at relatively high temperatures.The steam-cured increase being conducive to the cement hydraulicity of constant temperature, improves the physical strength of filler.Relatively and sintering process, this power consumption is low, and the pollution caused is little.
8, the Novel biofilm carrier prepared by the present invention and ordinary ceramsite are carried out biofilm experiment respectively in BAF, the biofilm time of Novel biofilm carrier is 4 days, and ordinary ceramsite at identical conditions biofilm need 6 days.Show that Novel biofilm carrier can shorten the biofilm time.Contrast biofilm biomass is known, and the biofilm biomass of Novel biofilm carrier is 97.93 ~ 102.29mg/g, and ordinary ceramsite biofilm biomass is 40.91mg/g, and the Novel biofilm carrier prepared by explanation is more conducive to attachment and the growth of microorganism.
Accompanying drawing explanation
Fig. 1 is the photo of Novel free sintering rapid biofilm biologic packing material prepared by the present invention;
Fig. 2 is the photo of ordinary ceramsite;
Fig. 3 is the SEM photo of Novel free sintering rapid biofilm biologic packing material prepared by test one;
Fig. 4 is the SEM photo of Novel free sintering rapid biofilm biologic packing material prepared by test two;
Fig. 5 is the SEM photo of ordinary ceramsite;
The setting drawing that Fig. 6 is test one, the Novel free of test two preparation sinters the biofilm experiment of rapid biofilm biologic packing material and ordinary ceramsite;
Fig. 7 is COD clearance change curve in different biofilm process; Wherein, ● for the Novel free testing a preparation sinters COD clearance change curve in rapid biofilm biologic packing material biofilm process; ▲ be COD clearance change curve in the Novel free sintering rapid biofilm biologic packing material biofilm process of test two preparation; ▼ is COD clearance change curve in ordinary ceramsite biofilm process;
Fig. 8 is ammonia nitrogen removal frank change curve in different biofilm process; Wherein, ● for the Novel free testing a preparation sinters ammonia nitrogen removal frank change curve in rapid biofilm biologic packing material biofilm process; ▲ be ammonia nitrogen removal frank change curve in the Novel free sintering rapid biofilm biologic packing material biofilm process of test two preparation; ▼ is ammonia nitrogen removal frank change curve in ordinary ceramsite biofilm process;
Fig. 9 is removal rate of phosphate change curve in different biofilm process; Wherein, ● for the Novel free testing a preparation sinters removal rate of phosphate change curve in rapid biofilm biologic packing material biofilm process; ▲ be removal rate of phosphate change curve in the Novel free sintering rapid biofilm biologic packing material biofilm process of test two preparation; ▼ is removal rate of phosphate change curve in ordinary ceramsite biofilm process.
Embodiment
Embodiment one: a kind of Novel free sintering rapid biofilm biologic packing material of present embodiment press mass percentage by 18% ~ 37% sepiolite, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7% are made.
Embodiment two: the preparation method of a kind of Novel free sintering rapid biofilm biologic packing material of present embodiment carries out according to the following steps:
One, the sepiolite of 18% ~ 37% is taken by mass percentage, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7%;
Two, polyvinyl alcohol step one taken and sodium alginate heating for dissolving, in water, add the hydrogen peroxide mixing that mass concentration that step one takes is 30%, obtain liquid mixture after cooling;
Three, sepiolite step one taken, medical stone, cement, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are pulverized last mixing, and obtain solid mixture;
Four, after the solid mixture mixing that liquid mixture step 2 obtained and step 3 obtain; the spherical particle of surface moisture is made with tablets press; after normal temperature places 1 ~ 2h; move on in baking oven and dry 1 ~ 2h at temperature is 80 ~ 90 DEG C; then the filler of 4 ~ 8mm is sieved out; it is 80 ~ 90 DEG C in temperature; pressure be under 0.1 ~ 0.15MPa after high pressure low temperature maintenance 10 ~ 12h; to be placed on water-bath at 60 ~ 80 DEG C constant temperature steam-cured 8 ~ 10 days; normal temperature cooling again, obtains Novel free sintering rapid biofilm biologic packing material.
Present embodiment comprises following beneficial effect:
1, adopt sepiolite and medical stone to be filler main ingredient in present embodiment, sepiolite is a kind of clay mineral of fibre layered moisture magnesosilicate, has many tubulose penetrating vias consistent with fiber elongation direction in the fibrous crystalline structure of sepiolite.This special structure makes sepiolite specific surface area large, and porosity is high, has good adsorptivity, and sepiolite itself is nontoxic, does not affect microorganism growth.Medical stone is a kind of natural mineral matter, the poroid structures shape of the honeycomb had its there is good absorption property.Medical stone contains the trace element required for microorganism growth, is conducive to the biofilm of microorganism at filling surface, thus plays good treatment effect to water pollutant.
2, agar itself is as the main component in biological medium, microbial growth can be promoted, and join in Novel biofilm carrier as Biostimulation agent, will microorganism be conducive in the attachment of filling surface and growth, thus be conducive to the biofilm of microorganism at filling surface.
3, adopt cement as one of binding agent in present embodiment, wherein cement has the hydraulicity, by the steam-cured hardness that can increase filler of constant temperature.Extend filler work-ing life, ensure that filler makes it from wearing and tearing carrying out bearing water impact in purification of water quality process.
4, the polyvinyl alcohol used has cementing property, is good binding agent.Sodium alginate has gelification, the interpolation of polyvinyl alcohol and sodium alginate can form macromolecule hydrogel, slowly degrade under the effect of microorganism, trace element controllably needed for releasing microbe growth and nutritive substance, when nutritional condition instability, maintain microbial growth, make microorganism can not because nutrition is too high raised growth, also can not be dead gradually because nutrition is too low, such nutrition that provides is conducive to biomembranous formation.Polyvinyl alcohol and sodium alginate all can not to the toxic effects of microorganism in addition, and especially sodium alginate has good biocompatibility, are a kind of " environmentally friendly " materials.
5, present embodiment adopts hydrogen peroxide to be whipping agent, under the effect of high pressure steam, peroxide decomposition produces bubble, thus makes the filler made have vesicular structure, increases specific surface area, large specific surface area and vesicular structure can be conducive to the attachment of microorganism, are beneficial to the biofilm of microorganism.
6, present embodiment with the addition of iron(ic) chloride in prepared filler, cobalt chloride, manganous sulfate.Ferro element, cobalt element, manganese element is the trace element needed for microorganism growth, these elements are added in filler, microorganism can be made under poor nutrient environment to maintain growth, accelerate biomembranous formation, reduce biofilm time and back flushing artifact film time of recovery of filler.
7, present embodiment have employed non-sintered technique in preparation technology, not only prevents sepiolite and medical stone crystalline structure from high temperature changing, also avoid agar sex change at relatively high temperatures.The steam-cured increase being conducive to the cement hydraulicity of constant temperature, improves the physical strength of filler.Relatively and sintering process, this power consumption is low, and the pollution caused is little.
8, the Novel biofilm carrier prepared by present embodiment and ordinary ceramsite are carried out biofilm experiment respectively in BAF, the biofilm time of Novel biofilm carrier is 4 days, and ordinary ceramsite at identical conditions biofilm need 6 days.Show that Novel biofilm carrier can shorten the biofilm time.Contrast biofilm biomass is known, and the biofilm biomass of Novel biofilm carrier is 97.93 ~ 102.29mg/g, and ordinary ceramsite biofilm biomass is 40.91mg/g, and the Novel biofilm carrier prepared by explanation is more conducive to attachment and the growth of microorganism.
Embodiment three: present embodiment and embodiment two unlike: take the sepiolite of 37% in step one by mass percentage, the medical stone of 18.52%, the cement of 18.56%, the polyvinyl alcohol of 3.70%, the sodium alginate of 5.56%, the volumetric concentration of 12.96% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.56%, the manganous sulfate of 0.56%, the cobalt chloride of 0.74% and the agar of 1.84%.Other is identical with embodiment two.
Embodiment four: present embodiment and embodiment two or three unlike: take the sepiolite of 18.52% in step one by mass percentage, the medical stone of 37%, the cement of 18.56%, the polyvinyl alcohol of 3.7%, the sodium alginate of 5.56%, the volumetric concentration of 12.96% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.56%, the manganous sulfate of 0.56%, the cobalt chloride of 0.74% and the agar of 1.84%.Other is identical with embodiment two or three.
Embodiment five: one of present embodiment and embodiment two to four unlike: at temperature is 90 DEG C, dry 1h in step 4.Other is identical with one of embodiment two to four.
Embodiment six: one of present embodiment and embodiment two to five unlike: be 90 DEG C in temperature in step 4, pressure is support after 10h through high pressure steam under 0.15MPa.Other is identical with one of embodiment two to five.
Embodiment seven: one of present embodiment and embodiment two to six unlike: in step 4 at 80 DEG C steam-cured 10 days of constant temperature.Other is identical with one of embodiment two to six.
By following verification experimental verification beneficial effect of the present invention:
Test one: the preparation method of a kind of Novel free sintering rapid biofilm biologic packing material of this test realizes according to the following steps:
One, the sepiolite of 37% is taken by mass percentage, the medical stone of 18.52%, the cement of 18.56%, the polyvinyl alcohol of 3.70%, the sodium alginate of 5.56%, the volumetric concentration of 12.96% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.56%, the manganous sulfate of 0.56%, the cobalt chloride of 0.74% and the agar of 1.84%;
Two, polyvinyl alcohol step one taken and sodium alginate heating for dissolving, in water, add the hydrogen peroxide mixing that step one takes, obtain liquid mixture after cooling;
Three, sepiolite step one taken, medical stone, cement, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are pulverized last mixing, and obtain solid mixture;
Four, after the solid mixture mixing that liquid mixture step 2 obtained and step 3 obtain; the spherical particle of surface moisture is made with tablets press; after normal temperature places 1h; moving on in baking oven and dry 1h at temperature is 90 DEG C, then sieve out the filler of 6mm, is 90 DEG C in temperature; pressure be under 0.15MPa after high pressure low temperature maintenance 10h; to be placed on water-bath at 80 DEG C constant temperature steam-cured 10 days, then normal temperature cooling, obtain Novel free sintering rapid biofilm biologic packing material.
Test two: the preparation method of a kind of Novel free sintering rapid biofilm biologic packing material of this test realizes according to the following steps:
One, the sepiolite of 18.52% is taken by mass percentage, the medical stone of 37%, the cement of 18.56%, the polyvinyl alcohol of 3.7%, the sodium alginate of 5.56%, the volumetric concentration of 12.96% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.56%, the manganous sulfate of 0.56%, the cobalt chloride of 0.74% and the agar of 1.84%;
Two, polyvinyl alcohol step one taken and sodium alginate heating for dissolving, in water, add the hydrogen peroxide mixing that step one takes, obtain liquid mixture after cooling;
Three, sepiolite step one taken, medical stone, cement, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are pulverized last mixing, and obtain solid mixture;
Four, after the solid mixture mixing that liquid mixture step 2 obtained and step 3 obtain; the spherical particle of surface moisture is made with tablets press; after normal temperature places 1h; moving on in baking oven and dry 1h at temperature is 90 DEG C, then sieve out the filler of 6mm, is 90 DEG C in temperature; pressure be under 0.15MPa after high pressure low temperature maintenance 10h; to be placed on water-bath at 80 DEG C constant temperature steam-cured 10 days, then normal temperature cooling, obtain Novel free sintering rapid biofilm biologic packing material.
The SEM photo of the Novel free sintering rapid biofilm biologic packing material of test one preparation as shown in Figure 3; The SEM photo of the Novel free sintering rapid biofilm biologic packing material of test two preparation as shown in Figure 4; The SEM photo of ordinary ceramsite (being selected from Jinan Hai Hua filtrate company limited) as shown in Figure 5; As can be seen from Fig. 3, Fig. 4 and Fig. 5, Novel biofilm carrier surface irregularity, and there is certain cavernous structure (especially testing the Novel free sintering rapid biofilm biologic packing material of two preparations), this coarse surface with cavernous structure of Novel biofilm carrier prepared by the present invention is described just as required for aerating biological filter pool filler, is conducive to attachment and the growth of microorganism.
The filler of test one, test two preparation and ordinary ceramsite are carried out biofilm experiment:
Adopt the mode of intermittent loading biofilm to test, as shown in Figure 6, cylindrical reactor material is plastics to experimental installation, and diameter is 6.5cm, is highly 28cm.The height adding filler is 13cm, and air passes into from reactor bottom.
This experiment starts reactor by the method for artificial inoculation active sludge, specific experiment operates: first in reaction unit, add filler, add mud again, mud is made to flood filler, add simulated wastewater (simulated wastewater preparation program refers to table 2) again, after Static Contact 24h, discharge suspended sludge, then pass into air and carry out intermittent loading biofilm.Aeration rate is 1.5L/h, and every 24h discharges supernatant liquor, and supplements the fresh simulated wastewater of same volume.Measure the COD, ammonia nitrogen and the phosphate concn that supplement waste water and discharge supernatant liquor every day simultaneously, when the clearance of COD reaches 60%, biofilm success when the clearance of ammonia nitrogen reaches 80%, and measure the biofilm biomass of each filler.The measuring method of different index is as shown in table 2.
Table 1
Table 2
In different biofilm process, COD clearance change curve as shown in Figure 7; Wherein, ● for the Novel free testing a preparation sinters COD clearance change curve in rapid biofilm biologic packing material biofilm process; ▲ be COD clearance change curve in the Novel free sintering rapid biofilm biologic packing material biofilm process of test two preparation; ▼ is COD clearance change curve in ordinary ceramsite biofilm process.
In different biofilm process, ammonia nitrogen removal frank change curve as shown in Figure 8; Wherein, ● for the Novel free testing a preparation sinters ammonia nitrogen removal frank change curve in rapid biofilm biologic packing material biofilm process; ▲ be ammonia nitrogen removal frank change curve in the Novel free sintering rapid biofilm biologic packing material biofilm process of test two preparation; ▼ is ammonia nitrogen removal frank change curve in ordinary ceramsite biofilm process.
In different biofilm process, removal rate of phosphate change curve as shown in Figure 9; Wherein, ● for the Novel free testing a preparation sinters removal rate of phosphate change curve in rapid biofilm biologic packing material biofilm process; ▲ be removal rate of phosphate change curve in the Novel free sintering rapid biofilm biologic packing material biofilm process of test two preparation; ▼ is removal rate of phosphate change curve in ordinary ceramsite biofilm process.
As can be seen from Fig. 7, Fig. 8 and Fig. 9, reaction runs to the 4th day, the Novel free sintering rapid biofilm biologic packing material of test one preparation reaches 62.75% to waste water COD clearance, and ammonia nitrogen removal frank reaches 91.43%, shows Novel free sintering rapid biofilm biologic packing material biofilm success prepared by test one.Run to the 8th day COD clearance and reach 86%, ammonia nitrogen and removal rate of phosphate reach 90.56% and 98% respectively.And the reactor being filled with ordinary ceramsite runs to the 6th day COD clearance and reaches 63.5%, ammonia nitrogen removal frank reaches 83.9%, now ordinary ceramsite biofilm success.Run to the 8th day COD clearance and be only 65.1%, ammonia nitrogen and removal rate of phosphate are respectively 84.2% and 95.3%; Compared with ordinary ceramsite, the Novel free sintering rapid biofilm biologic packing material of test one preparation shortens the biofilm time, improves water treatment effect, especially improves significantly in the removal effect of ammonia nitrogen.The reactor being filled with Novel free sintering rapid biofilm biologic packing material prepared by test two runs to the 4th day COD clearance and reaches 60.01%, within 6th day, COD clearance reaches 70.76%, ammonia nitrogen removal frank reaches 82.01%, shows Novel free sintering rapid biofilm biologic packing material biofilm success prepared by test two.Run to the 8th day COD clearance and reach 84.6%, ammonia nitrogen and removal rate of phosphate reach 90.27% and 96.29% respectively; Contrast with ordinary ceramsite, although the biofilm time is suitable, effluent quality significantly improves.
Different carrier biofilm amount is as shown in table 3.As can be seen from Table 3, the biofilm biomass of Novel biofilm carrier prepared by the present invention is apparently higher than ordinary ceramsite, this illustrates Novel biofilm carrier microbial growth metabolism preferably, and the Novel free testing two preparations sinters the biofilm biomass of rapid biofilm biologic packing material apparently higher than ordinary ceramsite, this is medical stone large percentage in the Novel free sintering rapid biofilm biologic packing material owing to testing two preparations, and containing the trace element that a large amount of Institute of Micro-biology needs in medical stone, relatively suitable micro-organisms growth metabolism, but although the raised growth of microorganism contributes to metabolism pollutent, but excessive growth makes the too much microbial film of filling surface load, the filler space flow resistance that diminishes is excessive, affect head loss.
Table 3
Claims (7)
1. a non-sintered rapid biofilm biologic packing material, it is characterized in that non-sintered rapid biofilm biologic packing material by mass percentage by 18% ~ 37% sepiolite, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7% are made; Its preparation method is: one, take the sepiolite of 18% ~ 37% by mass percentage, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7%; Two, polyvinyl alcohol step one taken and sodium alginate heating for dissolving, in water, add the hydrogen peroxide mixing that step one takes, obtain liquid mixture after cooling; Three, sepiolite step one taken, medical stone, cement, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are pulverized last mixing, and obtain solid mixture; Four, after the solid mixture mixing that liquid mixture step 2 obtained and step 3 obtain; the spherical particle of surface moisture is made with tablets press; after normal temperature places 1 ~ 2h; move on in baking oven and dry 1 ~ 2h at temperature is 80 ~ 90 DEG C; then the filler of 4 ~ 8mm is sieved out; it is 80 ~ 90 DEG C in temperature; pressure be under 0.1 ~ 0.15MPa after high pressure low temperature maintenance 10 ~ 12h; to be placed on water-bath at 60 ~ 80 DEG C constant temperature steam-cured 8 ~ 10 days; normal temperature cooling again, obtains non-sintered rapid biofilm biologic packing material.
2. a preparation method for non-sintered rapid biofilm biologic packing material, is characterized in that the preparation method of non-sintered rapid biofilm biologic packing material carries out according to the following steps:
One, the sepiolite of 18% ~ 37% is taken by mass percentage, the medical stone of 18% ~ 37%, the cement of 15% ~ 23%, the polyvinyl alcohol of 3% ~ 4.5%, the sodium alginate of 4.5% ~ 7%, the volumetric concentration of 10% ~ 16% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.45% ~ 0.69%, the manganous sulfate of 0.45% ~ 0.69%, the cobalt chloride of 0.63% ~ 0.9% and the agar of 1.5% ~ 2.7%;
Two, polyvinyl alcohol step one taken and sodium alginate heating for dissolving, in water, add the hydrogen peroxide mixing that step one takes, obtain liquid mixture after cooling;
Three, sepiolite step one taken, medical stone, cement, iron(ic) chloride, manganous sulfate, cobalt chloride and agar are pulverized last mixing, and obtain solid mixture;
Four, after the solid mixture mixing that liquid mixture step 2 obtained and step 3 obtain; the spherical particle of surface moisture is made with tablets press; after normal temperature places 1 ~ 2h; move on in baking oven and dry 1 ~ 2h at temperature is 80 ~ 90 DEG C; then the filler of 4 ~ 8mm is sieved out; it is 80 ~ 90 DEG C in temperature; pressure be under 0.1 ~ 0.15MPa after high pressure low temperature maintenance 10 ~ 12h; to be placed on water-bath at 60 ~ 80 DEG C constant temperature steam-cured 8 ~ 10 days; normal temperature cooling again, obtains non-sintered rapid biofilm biologic packing material.
3. the preparation method of a kind of non-sintered rapid biofilm biologic packing material according to claim 2, it is characterized in that the sepiolite taking 37% in step one by mass percentage, the medical stone of 18.52%, the cement of 18.56%, the polyvinyl alcohol of 3.70%, the sodium alginate of 5.56%, the volumetric concentration of 12.96% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.56%, the manganous sulfate of 0.56%, the cobalt chloride of 0.74% and the agar of 1.84%.
4. the preparation method of a kind of non-sintered rapid biofilm biologic packing material according to claim 2, it is characterized in that the sepiolite taking 18.52% in step one by mass percentage, the medical stone of 37%, the cement of 18.56%, the polyvinyl alcohol of 3.7%, the sodium alginate of 5.56%, the volumetric concentration of 12.96% is the hydrogen peroxide of 30%, the iron(ic) chloride of 0.56%, the manganous sulfate of 0.56%, the cobalt chloride of 0.74% and the agar of 1.84%.
5. the preparation method of a kind of non-sintered rapid biofilm biologic packing material according to claim 2, is characterized in that at temperature is 90 DEG C, drying 1h in step 4.
6. the preparation method of a kind of non-sintered rapid biofilm biologic packing material according to claim 2, to it is characterized in that in step 4 in temperature being 90 DEG C, pressure is support after 10h through high pressure steam under 0.15MPa.
7. the preparation method of a kind of non-sintered rapid biofilm biologic packing material according to claim 2, to is characterized in that in step 4 at 80 DEG C constant temperature steam-cured 10 days.
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| EP1743937A1 (en) * | 2005-07-13 | 2007-01-17 | Hitachi Plant Technologies, Ltd. | Microorganism-entrapping immobilization pellets and process for producing the same |
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| EP1743937A1 (en) * | 2005-07-13 | 2007-01-17 | Hitachi Plant Technologies, Ltd. | Microorganism-entrapping immobilization pellets and process for producing the same |
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